Yosemite National Park

Moonbow Over Yosemite Falls

Lunar rainbow (moonbow) over the base of upper Yosemite Falls, Yosemite National Park, California, USA. The moonbow appears during spring runoff when the falls create mist and a full moon is present. Most human vision can only see the moonbow as a grayish arc as the color cone receptors are not sensitive enough to send color signals to the brain.